A chronicle that depicts the life and career of Mao Zedong was released on Sunday to commemorate his 120th birthday, which falls on December 26.

The six-volume, three-million-word chronicle describes Mao's life and achievements after the founding of the People's Republic of China (PRC) in 1949, according to the Central Party Literature Press, the chronicle's publisher.

The chronicle offers a rare glimpse at speeches and talks that have not been included in Mao's works, the publisher said.

Mao was born in 1893 in Shaoshan Village in central China's Hunan Province. He died in 1976 at age 83. As one of the PRC's founders, Mao is one of the most influential figures in China's modern history.

The chronicle is significant for conducting research on Mao's thoughts, theories, work and practice, as well as studying the accomplishments, experience and arduous exploration of China's socialist revolution and construction led by the Communist Party of China, according to the publisher.

The publisher added that the chronicle is important for research on the origin and foundation of socialist theories with Chinese characteristics.

A revised version of the three-volume chronicle of Mao's life from 1893 to 1949, first published in December 1993, was also released on Sunday.